Stair support



FIG. 1 is a perspective view of the stair support;

FIG. 2 is a top view of the stair support;

FIG. 3 is a bottom view of the stair support;

FIG. 4 is a left side view of the stair support;

FIG. 5 is a right side view of the stair support;

FIG. 6 is a front view of the stair support; and,

FIG. 7 is a rear view of the stair support.

The ornamental design for a stair support, as shown, and described.